His areas of expertise include: philosophy of science (Dr.phil.), ethics of science, and technology assessment. His areas of competence include social studies of science and technology, history of science, ethics, logic, and history of philosophy. His topics of interest include but are not restricted to: the science-policy interface, risk, the precautionary principle, uncertainty & complexity, aquaculture, food ethics, governance, value studies, integrity in science, energy, public participation, gm-organisms. In several capacities, Kaiser has been advising policy nationally and on EU-level. Kaiser is an internationally recognized specialist in fields relating to ethics of science, food ethics, and integrity of science; he is Editor-in-Chief of the scientific journal Food Ethics (Springer), and past President of the European Society for Agricultural and Food Ethics.